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Homework Help: Hard transformer question

  1. Jun 6, 2010 #1
    1. The problem statement, all variables and given/known data
    see attachment





    3. The attempt at a solution
    for part a): I tried to use the equation N2/N1= I1/I2
    I got 12A, instead of the answer (24A)

    can someone please show me how to do this? I missed class one day, and now I'm lost
     

    Attached Files:

  2. jcsd
  3. Jun 6, 2010 #2
    help..anyone??
     
  4. Jun 6, 2010 #3

    ehild

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    Homework Helper

    How much is the secondary voltage?

    A resistor is connected across the secondary terminals. How much current flows through the resistor?

    This current is the secondary current of the transformer. How much is the primary current?

    If it is not stated otherwise, you can take the transformer ideal. It means that the power input is equal to the output power.

    You know both the voltage and current across the resistor, connected to the output of the transformer. How much is the power on the resistor?

    ehild
     
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